Brazilian multicenter study on pegvisomant treatment in acromegaly

ABSTRACT Objective Investigate the therapeutic response of acromegaly patients to pegvisomant (PEGV) in a real-life, Brazilian multicenter study. Subjects and methods Characteristics of acromegaly patients treated with PEGV were reviewed at diagnosis, just before and during treatment. All patients with at least two IGF-I measurements on PEGV were included. Efficacy was defined as any normal IGF-I measurement during treatment. Safety data were reviewed. Predictors of response were determined by comparing controlled versus uncontrolled patients. Results 109 patients [61 women; median age at diagnosis 34 years; 95.3% macroadenomas] from 10 Brazilian centers were studied. Previous treatment included surgery (89%), radiotherapy (34%), somatostatin receptor ligands (99%), and cabergoline (67%). Before PEGV, median levels of GH, IGF-I and IGF-I % of upper limit of normal were 4.3 µg/L, 613 ng/mL, and 209%, respectively. Pre-diabetes/diabetes was present in 48.6% and tumor remnant in 71% of patients. Initial dose was 10 mg/day in all except 4 cases, maximum dose was 30 mg/day, and median exposure time was 30.5 months. PEGV was used as monotherapy in 11% of cases. Normal IGF-I levels was obtained in 74.1% of patients. Glycemic control improved in 56.6% of patients with pre-diabetes/diabetes. Exposure time, pre-treatment GH and IGF-I levels were predictors of response. Tumor enlargement occurred in 6.5% and elevation of liver enzymes in 9.2%. PEGV was discontinued in 6 patients and 3 deaths unrelated to the drug were reported. Conclusions In a real-life scenario, PEGV is a highly effective and safe treatment for acromegaly patients not controlled with other therapies.

A review of Cushing's disease treatment by the Department of Neuroendocrinology of the Brazilian Society of Endocrinology and Metabolism

ABSTRACT The treatment objectives for a patient with Cushing's disease (CD) are remission of hypercortisolism, adequate management of co-morbidities, restoration of the hypothalamic-pituitary-adrenal axis, preservation of fertility and pituitary function, and improvement of visual defects in cases of macroadenomas with suprasellar extension. Transsphenoidal pituitary surgery is the main treatment option for the majority of cases, even in macroadenomas with low probability of remission. In cases of surgical failure, another subsequent pituitary surgery might be indicated in cases with persistent tumor imaging at post surgical magnetic resonance imaging (MRI) and/or pathology analysis of adrenocorticotropic hormone-positive (ACTH+) positive pituitary adenoma in the first procedure. Medical treatment, radiotherapy and adrenalectomy are the other options when transsphenoidal pituitary surgery fails. There are several options of medical treatment, although cabergoline and ketoconazole are the most commonly used alone or in combination. Novel treatments are also addressed in this review. Different therapeutic approaches are frequently needed on an individual basis, both before and, particularly, after surgery, and they should be individualized. The objective of the present review is to provide the necessary information to achieve a more effective treatment for CD. It is recommended that patients with CD be followed at tertiary care centers with experience in treating this condition.

Recommendations of the Neuroendocrinology Department of the Brazilian Society of Endocrinology and Metabolism for the diagnosis of Cushing's disease in Brazil

ABSTRACT Although it is a rare condition, the accurate diagnosis and treatment of Cushing’s disease is important due to its higher morbidity and mortality compared to the general population, which is attributed to cardiovascular diseases, diabetes mellitus and infections. Screening for hypercortisolism is recommended for patients who present multiple and progressive clinical signs and symptoms, especially those who are considered to be more specific to Cushing’s syndrome, abnormal findings relative to age (e.g., spinal osteoporosis and high blood pressure in young patients), weight gain associated with reduced growth rate in the pediatric population and for those with adrenal incidentalomas. Routine screening is not recommended for other groups of patients, such as those with obesity or diabetes mellitus. Magnetic resonance imaging (MRI) of the pituitary, the corticotropin-releasing hormone (CRH) test and the high-dose dexamethasone suppression test are the main tests for the differential diagnosis of ACTH-dependent Cushing’s syndrome. Bilateral and simultaneous petrosal sinus sampling is the gold standard method and is performed when the triad of initial tests is inconclusive, doubtful or conflicting. The aim of this article is to provide information on the early detection and establishment of a proper diagnosis of Cushing’s disease, recommending follow-up of these patients at experienced referral centers. Arch Endocrinol Metab. 2016;60(3):267-86.

Thickened pituitary stalk associated with a mass in the sphenoidal sinus: an alarm to suspect hypophysitis by immunoglobulin g4?

Introduction Hypophysitis is a chronic inflammation of the pituitary gland of complex and still incompletely defined pathogenesis. It belongs to the group of non-hormonesecreting sellar masses, sharing with them comparable clinical presentation and radiographic appearance. Objectives Describe the case of immunoglobulin G4 (IgG4)-related hypophysitis presenting as a mass in the sphenoid sinus. Resumed Report A 40-year-old Brazilian man had a diagnosis of central diabetes insipidus since 2001 associated with pituitary insufficiency. Pituitary magnetic resonance imaging revealed a centered pituitary stalk with focal nodular thickening and the presence of heterogeneous materials inside the sphenoid sinus. The patient was treated with testosterone replacement therapy. Laboratory results revealed increased IgG4 serum. Conclusion IgG4-related hypophysitis should be considered in patients with pituitary insufficiency associated with sellar mass and/or thickened pituitary stalk. IgG4 serum measurement for early diagnosis of IgG4-related hypophysitis should be performed.

Persistence of intrasellar trigeminal artery and simultaneous pituitary adenoma: description of two cases and their importance for the differential diagnosis of sellar lesions / Persistência da artéria trigeminal intrasselar e simultâneo adenoma de hipófise: descrição de dois casos e importância para o diagnóstico diferencial das lesões selares

Persistent trigeminal artery (PTA) is the most frequent embryonic communication between the carotid and vertebrobasilar systems. However, hormonal changes or the association of PTA with other sellar lesions, such as pituitary adenomas, are extremely rare. The aim of the present study was to report two patients with intrasellar PTA and simultaneous pituitary adenoma in order to emphasize the importance of differential diagnoses for sellar lesions. Case 1. A female patient, 41 years old, was admitted with a history of chronic headache (> 20 years). Pituitary magnetic resonance imaging (MRI) showed a rounded lesion in the left portion of the pituitary gland suggestive of adenoma (most likely clinically non-functioning adenoma). In addition to this lesion, the MRI demonstrated ecstasy of the right internal carotid artery and imaging suggestive of an intrasellar artery that was subsequently confirmed by an angio-MRI of the cerebral vessels as PTA. Case 2. A female patient, 42 years old, was admitted with a history of amenorrhea and galactorrhea in 1994. Laboratorial investigation revealed hyperprolactinemia. Pituitary MRI showed a small hyposignal area in the anterior portion of pituitary gland suggestive of a microadenoma initiated by a dopaminergic agonist. Upon follow-up, aside from the first lesion, the MRI showed a well delineated rounded lesion inside the pituitary gland, similar to a vessel. Angio-MRI confirmed a left primitive PTA. Failure to recognize these anomalous vessels within the sella might lead to serious complications during transsphenoidal surgery. Therefore, although their occurrence is uncommon, a working knowledge of vascular lesions in the sella turcica or pituitary gland is important for the differential diagnosis of pituitary lesions, especially pituitary adenomas.

Persistência da artéria trigeminal (PAT) é a comunicação embrionária mais frequente entre os sistemas carotídeo e vertebrobasilar. No entanto, alterações hormonais ou associação de PAT com outras lesões selares, como adenomas hipofisários, são extremamente raros. O objetivo do presente estudo foi relatar dois pacientes com PAT intrasselar e concomitante adenoma hipofisário e enfatizar a importância para o diagnóstico diferencial de lesões selares. Caso 1. Paciente do sexo feminino, 41 anos, admitida com história de cefaleia crônica (> 20 anos). Ressonância magnética (RM) de hipófise mostrou imagem arredondada na porção esquerda da glândula sugestiva de adenoma (provavelmente adenoma clinicamente não funcionante). Adicionalmente, a RM demonstrou ectasia da artéria carótida interna direita e imagem sugestiva de artéria intrasselar, posteriormente confirmada por angio-RM dos vasos cerebrais como PAT. Caso 2. Paciente do sexo feminino, 42 anos, admitida com história de amenorreia e galactorreia em 1994. A investigação laboratorial revelou hiperprolactinemia. RM de hipófise mostrou pequena área de hipossinal na porção anterior da glândula sugestiva de microadenoma, sendo iniciado agonista dopaminérgico. Na evolução, além da primeira lesão, a RM mostrou uma imagem arredondada bem delimitada dentro da glândula pituitária semelhante a vaso sanguíneo. Angio-RM confirmou PAT primitiva esquerda. A falta de reconhecimento de tais vasos anômalos dentro da sela túrcica pode levar a sérias complicações durante a cirurgia transesfenoidal. Portanto, apesar de sua ocorrência não ser comum, o conhecimento de lesões vasculares dentro da sela túrcica ou glândula hipofisária é importante para o diagnóstico diferencial de lesões da hipófise, especialmente com adenomas hipofisários.

Impact of recombinant human growth hormone (RH-RG) treatment on psychiatric, neuropsychological and clinical profiles of GH deficient adults

Background: Untreated GH-deficient adults have a diversity of dysfunctions (e.g. reduced muscle strength, emotional instability during strress, depressive symptons) that may cause deletrious effects on quality of life, and may be positively influenced by recombinant human growth hormone (rh-GH) therapy. Aim: To evaluate the impact of a clinical intervention with rh-GH therapy on GH-deficient adults. Method: The physical, psychiatric and neuropsychological status of 9 GH-deficient adults was determined before and after the administration of rh-GH (0.250 IU/Kg/week) in a double blind placebo-controlled trial for six months. Patients then received rh-GH for a further period of 6 months and their status was re-evaluated. Results: Rh-GH was significant better than placebo at 6th month (p<0.05), producing increased serum Insulin like growth factor-I (IGF-1) levels, reduced body mas index (BMI) and body fat, increased lean body mass and water, reduced wains/hip ratio and increased energy expenditure. The rh-GH therapy was also significantly better than placebo on depressive features as measured by the Hamilton Depression Scale (17-itens) (p=0.0431) and the Beck Depression Inventory (p=0.0431). Neuropsychological evaluations showed significant improvements in measures of Attention: Digit Backward (p=0.035), Verbal Flency (FAS) (p=0.02) and Cognitive Efficiency (WAIS-R tests): Vocabulary (p=0.027), Picture Arrangements (p=0.017), and Comprehension (p=0.01) following rh-GH therapy. Conclusion: The clinical, psychiatric, and neuropsychological impairements of untreated GH-deficient adults can be decresed by rh-GH therapy.

Obesidade: etiopatogenia, risco cardiovascular e abordagem terapêutica / Obesity: ethiopathogeny, cardiovascular risk and therapeutic aproach options

A obesidade é um distúrbio metabólico com grande prevalência e difusäo por todo o planeta, e certamente relacionada a hábitos sedentários e erros alimentares das populaçöes. Embora seja raramente secundária a causas endócrinas, como hipercortisolismo e hipotiroidismo, na maioria das vezes ela é decorrente do excesso de ingestäo calórica em relaçäo aos gastos energéticos. A influência genética na prevalência familiar do distúrbio (antes atribuída apenas à transmissäo de hábitos alimentares) tem sido cada vez mais valorizada, tanto em relaçäo ao padräo da obesidade como à menor eficiência metabólica: indivíduos acumulam quantidades diferentes de tecido adiposo com o mesmo aporte calórico. Além do comprometimento estético, a obesidade está relacionada a maior morbidade e mortalidade por várias causas. Desta forma, este distúrbio metabólico merece atençäo médica, tanto no diagnóstico diferencial como no tratamento adequado. Neste capítulo vamos focalizar aspectos da fisiopatologia e epidemiologia da obesidade relacionados ao comprometimento cardiovascular, e mostrar a nossa visäo sobre o seu tratamento, incluindo aquele dirigido a pacientes com cardiopatias.